Oil-well packer



P. H. MACK.

OIL WELL PACKER.

APPLICATION FILED Nov. 2B. 1919.

15395971 9. Patented Nov. 1, 1921.

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PATRICK H. MACK, OF BRADFORD, PENNSYLVANIA, ASSIGNOR T0 OIL WELL SUPPLYCOMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

OIL-WELL PACKER.

Specification o! Letters Patent.

Patented Nov. 1, 1921.

To all whom it may conce/Mt:

Be it known that I, PATRICK H. M AGK, a citizen of the United States,residlng Bradford, in the county of McKean and State of Pennsylvania,have invented certain new and useful Improvements in OlllVell Packers,of which the following 1s a specification. i

The prime object of my invention 1s to provide a new and improved wellpacker structure including means adapted to contain a suitable material,such as cement, for filling in the bottom of the hole or well.

In the drawings I have shown a packer' of the type shown, described andclaimed in a companion application Serial No. 341,172, filed November28, 1919, but it will be evident that the well packer structure of thepresent invention is not limited to a comb'.- nation including theparticular type of packer shown.

In the accompanying drawings which illustrate an application of myinvention,

Figure 1 is a central longitudinal sectional View of a packer structureembodying my invention;

Fig. 2, a sectional view taken on line II-II of Fig. 1;

Fig. 3, an enlarged detail sectional vrw showing lower portion ofcontainer with valve seated;

Fig. 4, a similar view showing valve unseated; and

Fig. 5, a horizontal section taken on line V-V of Fig. 3.

Referring to the drawings and as pre- `ferred, the packer structureincludes a body member 1, this member being preferably solid and ofcylindrical form. The upper end of the body is provided with anexternally threaded extension 2 and its lower end is reduced as shown at3, and is also provided with a cone-shaped extension 4. JXtension 4 maybe formed integral with the body or it may be a separable' member; ineither case it is provided with an opening 5 adapted to receive a pin 6whereby the lower telescoping end member or sleeve 7 is secured to thebody. Pin 6 is designed to be broken-during the operation of setting thepacker, thereby permitting the lower end of the body or the extension tobe lowered within member 7. l

The telescopingly connected member 7, which is of hollow construction,has its interior wall provided with teeth or serrations 8 and is alsoformed with a reduced externally threaded portion 9. 10 designates theupper end member or cap which is formed with a threaded recess 11designed to recelve the upper threaded extension 2 of the body member,and with a horizontally ex- -tending opening 12, the latter' beingdesigned to contain a pin 12', whereby the packer structure, by theemployment of a wire lor other means, may be connected with a string oftools, not shown. Cap 10 is also formed with an annular inclinedshoulder 13.

Surrounding the reduced portion 3 'of body member 1 is a spring or aplurality of sp1-ings 14, the upper end of spring 14 bearing against ashoulder of member 1 and the lower end, or ends in case a plurality ofsprings are employed, against toothed elements or members 15. Toothedmembers l5 are positioned between the extension 4 and the toothed wall 8of member 7 and are maintained in the desired positions by the spring 14and dowel pin 16. It will be understood that as the members 15 are moveddownwardly in the bore of sleeve 7, the teeth of said members willengage the teeth 8 of member 7, thereby locking member 7 to the body atany desired elevation.

The compressible packing element or elements surrounding the body, asillustrated and as preferred, include two sets of com.

pressible elements 17 and 18. The elements 17, located at the upper andlower ends of the packing, are designed upon compression to be forcedinwardly against the body for the purpose of forming seals at the upperand lower ends of the packing to prevent fluids working in between thebody and the packing, while the elements 18 are designed to be forcedoutwardly against the wall of the well, as is usual.

Elements 18 have top and bottom faces inclined from the outer peripheryinwardly, while the elements 17 have their top and bottom faces inclinedin an opposite direction from the faces of elements 18. Interposedbetween the elements 18 are rigid ring members 19 having their facesinclined in opposition with the corresponding faces of the compressibleelements 18. The upper packing element 17 is held between the shoulder13 of cap or upper member 10and a rigid member 20, and the lower element17 between a similar rigid member 21 and an'inclined face 22 of anannular wedge shaped abutment or member 23. The compiessible elementsmay be formed ot' any suitable material; I have found lead to be adesirable material for some purposes.

Surrounding the body and interposed between the member 23 and a wedgemember 24. are slips 25. 26 designates means for retaining the slips inposition prior to their being forced out into contact with the wall ofthe well.

The container member of the packer structure is designed to be connectedwith the lower threaded portion 9 of the sleeve 7 and as illustrated,the container includes a hollow cylindrical body 27 having its lower endprovided with a valve controlled closure 28 and a plunger member 29. 30designates a coupling member into which the upper end of member 29 isentered, said coupling being adapted to engage portion 9 of sleeve 7.

Closure 28 is formed with a plurality of passageways 31 through whichthe material carried in the container is discharged. 32 designates avalve device for controlling the discharge of material from thecontainer and said valve device includes a depending stem 33 and a lowerend member 34.

The packer structure illustrated is designed to be lowered into positionin a well and set by a string of tools to which the structure isdetachably connected. It will be understood that when the lower member34 of the valve device strikes the bottom of the well, the valve will beraised from its seat, thus opening the passageways for the discharge ofthe cement or other material. and that the plunger member 29 as it islowered by the packer proper will force the material out through saidpassageways. When the downward movement of the plunger has been checked,it will cause the opposing end members of the packer to be movedtogether, expanding the packin into contact with the wall of the well,con ning the cement, and permitting it to set. Thus, the operation ofthe valve, the movement of the plunger, and the actuation of the packingexpanding means will follow in rapid sequence.

What I claim is:

1. The combination with a well packer, of a container adapted to besecured to the lower end o'f the packer and includingva hollow body, aclosure for the lower end of the body, said closure provided with anoutlet passage, means controlling the passage of material through saidoutlet passage, and means whereby the packer will be expanded after thecontrolling means has been moved to open the outlet passage.

2. The combination with a well-packer, of a container adapted to besecured to the lower end of the packer and including a hollow body, aplunger operable within the body and serving to connect 4it with thepacker, a closure for the lower end of the body, said closure providedwith an outlet passage, and means controlling the passage of materialthrough said outlet' passage.

3. The combination with a well packer having opposing end members, abody member, packing elements surrounding the body and disposed betweenthe end members, of a container carried by the packer, and means forconnecting the container to one of the end members.

4. The combination with a well packer having opposing end members, abody member, packing elements surrounding the body and disposed betweenthe end members, ot' a container carried by the packer, and means forconnecting the container to one of thi-l end members, said meansincluding a plunger in the container operated by the packer. 5. Thecombination with an oil well packer having expansible packing meansthereon, of a container carried by the packer, and a plunger in saidcontainer connected with the packer and adapted to be actuated thereby.

6. The combination with an oil well packer having expansible packingmeans thereon and means for expanding the packing means, of a containercarried thereby, and means for connecting the packer and container forexpressing the material from the container and causing said packingexpanding means to actuate.

7. The combination with an oil well packer having expansible packingmeans thereon and means for expanding the packing, of a containercarried by the packer having outlet passages therein, valve means forcontrolling the passages, a plunger for forcing material from thecontainer, said plunger being connected with said means for expandingthe packing, said valve means, plunger and packing expanding means beingarranged to operate in sequence.

8. The combination with a well packer having expansible packing meansthereon and means for expanding the packing, of a container carried bythe packer, plunger actuated means for l.causing the contents of thecontainer to escape, said plunger actuated means and packing expandingmeans being connected and arranged to operate in se uence.

n testimony whereof I alx my signature in presence of two witnesses.

PATRICK H. MACK.

Witnesses:

W. E. BURDICK, RALPH WHEELER.

